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Crystal Research and Technology

Cover image for Vol. 49 Issue 1

January 2014

Volume 49, Issue 1

Pages A1–A5, 1–83

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Special Issue
    7. Original Papers
    1. You have free access to this content
      Cover Picture: Crystal Research and Technology 1'2014

      Article first published online: 25 JAN 2014 | DOI: 10.1002/crat.201470001

      Thumbnail image of graphical abstract

      This brief review gives a brief overview of the pioneer work, theory and sensitivities as well as selected recent applications of powerful and promising Resonant X-ray Diffraction (RXD) techniques.

  2. Issue Information

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Special Issue
    7. Original Papers
    1. You have free access to this content
      Issue Information: Crystal Research and Technology 1'2014

      Article first published online: 25 JAN 2014 | DOI: 10.1002/crat.201470002

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Special Issue
    7. Original Papers
    1. You have free access to this content
      Contents: Crystal Research and Technology 1'2014 (pages A1–A5)

      Article first published online: 25 JAN 2014 | DOI: 10.1002/crat.201420001

  4. Editorial

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Special Issue
    7. Original Papers
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      Celebrating the International Year of Crystallography: a new look for Crystal Research & Technology (page 1)

      Wolfgang Neumann, Klaus-Werner Benz and Hakim Meskine

      Article first published online: 25 JAN 2014 | DOI: 10.1002/crat.201370084

  5. Special Issue

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Special Issue
    7. Original Papers
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      21st Annual Meeting of the German Crystallographic Society : 19th–22nd March 2013 in Freiberg, Germany (pages 2–3)

      Prof. Dirk C. Meyer, Dr. Barbara Abendroth and Dipl.- Volksw. Claudia Baldauf

      Article first published online: 25 JAN 2014 | DOI: 10.1002/crat.201370083

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      Structural complexity of hexagonal prismatic crystal specimens of fluorapatite-gelatine nanocomposites: A case study in biomimetic crystal research (pages 4–13)

      Rüdiger Kniep, Paul Simon and Elena Rosseeva

      Article first published online: 19 NOV 2013 | DOI: 10.1002/crat.201300207

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      Hexagonal prismatic crystal-like entities of fluorapatite-gelatine nanocomposites were grown by double-diffusion in gelatine gels. TEM images together with atomistic computer simulations reveal the material to be best described as a mosaic-dominated nanocomposite superstructure. Intrinsic electric dipole fields, generated by the composite during its morphogenesis, cause the integration of a meso/macroscopic of gelatine microfibrils into the superstructure matrix.

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      Application of a Difference Electron Nanoscope (DEN) – a computer hard- and software to display 3D electron densities and magnetical structures based on spectroscopic and diffractometric data (pages 14–20)

      W. Lottermoser, K. Steiner, G. Scharfetter, S.-U. Weber, M. Grodzicki, A. Kirfel and G. Amthauer

      Article first published online: 29 OCT 2013 | DOI: 10.1002/crat.201300208

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      M1 position of synthetic fayalite at 0.5,0.5,0.5 with a blue wire frame model representing the electric field gradient, surrounding difference electron densities (light brown) from synchrotron diffraction data and direction of the internal magnetic field H(0) at 50K (red arrow) from Mössbauer spectroscopy

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      Ambient and high-pressure synthesis, composition, and crystal structure of B-mullites (pages 21–31)

      H. Lührs, S. Soellradl, S. P. King, J. V. Hanna, J. Konzett, R.X. Fischer and H. Schneider

      Article first published online: 19 AUG 2013 | DOI: 10.1002/crat.201300210

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      The chemical compositions of several B-doped mullite samples were analyzed using prompt gamma activation analyses (PGAA) indicating that 15% of the Si in the crystal structure of mullite can be replaced by B during sol-gel synthesis at ambient pressure and 1200°C without the formation of impurities.

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      Single-crystal X-ray diffraction investigation of the reversible order-disorder phase transition in iron-deficient TlFe2–xSe2 (pages 32–37)

      E. Ahrens, F. Nitsche, Th. Doert and M. Ruck

      Article first published online: 13 SEP 2013 | DOI: 10.1002/crat.201300223

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      A reversible phase transition was found for iron-deficient TlFe2–xSe2 (x ≈ 0.4) and investigated on single crystals using high temperature synchrotron radiation X-ray diffraction. The high-temperature form (space group I4/mmm, lattice parameters a = 3.8919(3) Å, c = 14.027(3) Å) shows complete statistical disorder of iron positions and vacancies in a ThCr2Si2 type structure. The low-temperature form corresponds to a √5×√5 superstructure of the ThCr2Si2 type (I4/m, a = 8.6966(2) Å, c = 14.009(9) Å) and shows partial ordering of iron positions and vacancies.

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      Strain mapping for advanced CMOS technologies (pages 38–42)

      V. B. Özdöl, D. Tyutyunnikov, C. T. Koch and P. A. van Aken

      Article first published online: 13 JAN 2014 | DOI: 10.1002/crat.201300226

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      Combining high spatial resolution, high precision and large field of view in strain mapping of semiconductor devices by means of dark-field inline holography.

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      Probing a crystal's short-range structure and local orbitals by Resonant X-ray Diffraction methods (pages 43–54)

      Matthias Zschornak, Carsten Richter, Melanie Nentwich, Hartmut Stöcker, Sibylle Gemming and Dirk C. Meyer

      Article first published online: 25 JAN 2014 | DOI: 10.1002/crat.201300430

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      Diffraction Anomalous Fine Structure (DAFS) combines the long-range, crystallographic sensitivity of X-ray diffraction with the short-range sensitivity of X-ray Absorption Spectroscopy (XAS). The Anisotropy of Anomalous Scattering (AAS) extends the concept of isotropically scattering atoms to a more general case, where the atom's scattering characteristics depend on the polarization as well as the wavevector of the incident and scattered X-rays. The present condensed review gives a brief overview on the pioneer work, the theory and sensitivities as well as selected recent applications of these powerful and promising Resonant X-ray Diffraction (RXD) methods.

  6. Original Papers

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Special Issue
    7. Original Papers
    1. You have free access to this content
      Argon plasma treatment on metal substrates and effects on diamond-like carbon (DLC) coating properties (pages 55–62)

      Abdul Wasy, G. Balakrishnan, S. H. Lee, J. K. Kim, D. G. Kim, T. G. Kim and J. I. Song

      Article first published online: 27 DEC 2013 | DOI: 10.1002/crat.201300171

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      The diamond like carbon coatings (DLC) of 400 nm thickness was deposited on etched and non-etched tungsten carbide-cobalt (WC-Co) and stainless steel (SUS) substrates by filtered cathodic vacuum arc system. Raman studies showed the broad peak ∼1550 cm−1 indicates the formation of amorphous carbon or diamond-like carbon. It was found that the DLC coatings indictaed the low friction coefficient of ∼0.12–0.14 on the plasma etched WC-Co and SUS substrates. The DLC coatings on plasma etched WC-Co substrates shown better adhesion strength.

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      Changes of the crystal structure at the relaxor ferroelectric phase transition of strontium barium niobate (SBN53) (pages 63–69)

      H. A. Graetsch

      Article first published online: 15 JAN 2014 | DOI: 10.1002/crat.201300281

      Thumbnail image of graphical abstract

      Heating Sr0.53Ba0.47Nb2O6 to the ferroelectric (FE) phase transition near 95 °C causes shifts of the atoms which gradually reduce the microscopic spontaneous electric polarization parallel to the tetragonal c-axis, i.e. the niobium atoms move closer to the center of their coordination octahedron. A very large anisotropic increase of the atomic displacement parameter U33 of part of the niobium atoms (Nb1) indicates enhanced structural disorder in the intermediate high temperature phase. A similarly high anisotropic U11 atomic displacement parameter of the large Me2 site can be assigned to static disorder caused by incomplete occupation by Ba2+ and Sr2+.

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      Magnesium chloride, dioxane and water-ternary phase diagram and powder XRD data (pages 70–77)

      Miaomiao Jin, Yuzhu Sun, Ping Li, Jianguo Yu and Joachim Ulrich

      Article first published online: 15 JAN 2014 | DOI: 10.1002/crat.201300296

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      MgCl2-C4H8O2-H2O co-crystallization method has been used to separate magnesium chloride from brines. Basic data are needed to design industrial processes. Therefore, the phase diagram of the ternary system MgCl2-C4H8O2-H2O at five different temperatures (278.15K, 288.15K, 298.15K, 308.15K and 318.15K) is studied systematically by an isothermal solution saturation method. It is found that with a decreasing temperature, an increasing yield is obtained. The XRPD pattern of the crystals MgCl2·6H2O·C4H8O2 and MgCl2·2C4H8O2 are also obtained and presented.

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      Metastable zone width of SrCl2·6H2O during cooling crystallization (pages 78–83)

      Yuanyuan Qian, Guimin Lu, Yuzhu Sun, Xingfu Song and Jianguo Yu

      Article first published online: 27 DEC 2013 | DOI: 10.1002/crat.201300303

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      The metastable zone width (MSZW) of SrCl2·6H2O during cooling crystallization was determined by the focused beam reflectance measurement (FBRM). The effects of the saturation temperature, cooling rate, stirring rate, Ca2+ ion impurity, and seed crystals on the MSZW were investigated. The MSZW increased with the increase in the cooling rate and decreased with the increase in the saturation temperature, stirring rate, and Ca2+ ion concentration. The seeded MSZW decreased than the unseeded one, and seed surface is the key factor for nucleation. Small seeds provide a large surface area with high adsorption capacity for solute. They can consume more supersaturation on seed growth, thus retraining nucleation.

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